Question: How was the population of Krefeld determined to be 226,812?
Paraphrase: What method was used to determine Krefeld's population of 226,812?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q2805 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '226812')) . ?s pq:P459 ?value}